import { UrlQueryMap } from '@grafana/data'; export interface MigrationHandler<From extends BaseExploreURL | never, To> { /** * The parse function is used to parse the URL parameters into the state object. */ parse: (params: UrlQueryMap) => { to: To; error: boolean }; /** * the migrate function takes a state object from the previous schema version and returns a new state object */ migrate?: From extends never ? never : (from: From) => To; } export interface BaseExploreURL { schemaVersion: number; }